Graig,
#F00523
JT

While I was running mine I noticed a lot of air bubbles going into the carb. It seemed to take more time than normal to pump the fuel out of the tank,like it was pulling in air some where. I pulled the tank, the supply side did not have a good seal. I built up a spot on tube with solder and clamped the flexible tube on each side of the spot.( inside the tank also) I just ran it again and it seems to be fine. The holidays and weather have put a crimp in the flying.
Our weather has been on the cool side for us,I will give it more time to warm up. Here two or three days below 50 is a real cold wave.

jtflys thanks,

It is an early serial and as was mentioned previously, hopefully a one off.
Going by this forum thats two mechanical failures reported "that i know of",although interestingly,both at the bigend area.
Although,not bad for a new model/design going by the number reported here in service performing well without issue.

Cheers

Take a sock( like the kind you wear on your foot) and cut the top part off that is kinda the stretchy part & place it around the cylinder in very cold weather. It will be better for the engine to run warmer ...just make sure it does not get too hot. Running a engine too cool is not good at all. Capt,n

I have wrapped aluminium foil around the engine's cylinder when it's really cold outside. Running an engine too cool is almost as bad as overheating.

Thanks! I will try the sock version first.

CaptinJohn - I like the sock idea. Would you recommend that for a 50cc gasser, too? Or just these smaller engines? And at what temp would you recommend we start using the sock? Thanks.

I have a snowblower 2 cycle engine. It works in all kindof frigid weather. It is 25 years old andstill going st rong. I have an RCGf 15 that I put a hundred flights last year off the snow.
It was flown in 12 and15 degree weather. Still runs like new.

Nice to hear about your good running engines........but do you warm them up in the cold weather or jut go fly. That info would be more helpful.

No longer than if it were 70 out.

Hi,

Just noticed that you use nylon screws for the L/G - any particular reason why you use nylon instead of steel ?

Regards

Sandy Jain

Hi, need some help.
I have world model 70 inch P47 and CRRC GF26i V2 on it and hawk wooden prop 17 x 10 and it seems like not enough power with this engine. I plan to replace the engine with DLE 20. Is it much power with this engine for this kind of plane.
Thanks, any comments appreciate

They act like a fuse in case I have a dead stick like on Sunday. That way nothing except the screws need to replaced.

Just my opinion, OK? I'm not real sure if the engine swap will give you much more power. It'll be a few ounces lighter, but turning that into extra performance to make the swap worth it may be challenging. Prior to going that route, I might be tempted to try a couple different props to see if some gains may be had going that way. Maybe a 16x10 or a 17x8?

Specs on that plane:
<span class="Apple-style-span" style="font-family: Arial, Helvetica, sans-serif; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; "><table width="100%" border="0" cellspacing="0" cellpadding="8" style="font-size: 12px; text-decoration: none; "> <tbody> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td valign="bottom" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "><font face="Arial, Helvetica, sans-serif" size="2" color="#003399">Specifications</font></td> </tr> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <table width="100%" border="0" cellspacing="1" cellpadding="1" style="font-size: 12px; text-decoration: none; "> <tbody> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td width="28%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">Wing Span</td> <td width="2%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">:</td> <td width="70%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">70 in / 1780 mm</td> </tr> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td width="28%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">Wing Area</td> <td width="2%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">:</td> <td width="70%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">893 sq in / 57.6 sq dm</td> </tr> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td width="28%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">Flying Weight</td> <td width="2%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">:</td> <td width="70%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">10.7 lbs / 4850 g</td> </tr> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td width="28%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">Fuselage Length</td> <td width="2%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">:</td> <td width="70%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">62 in / 1580 mm</td> </tr> <tr style="font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; "> <td width="28%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">Engine Required</td> <td width="2%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">:</td> <td width="70%" valign="top" style="font-size: 12px; text-decoration: none; font: normal normal normal 12px/normal Arial, Helvetica, sans-serif; ">4-stroke 1.20 engine</td> </tr> </tbody> </table> </td> </tr> </tbody></table></span>
At 10+ pounds will the DLE-20 be enough engine for this plane?
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I can tell you that the 17-10 is too much prop for the CRRC 26. You will get better performance with a 17-7 or a 18-6 Zoar or equal type of prop.

Go back to this threads first msg [Post #1], and under the [Interesting Comments] area you'll see it stating more power than a CRRC 26.
Loads of other hot-links to info on this engine in that post as well!

So, yes, you'd be better of with this DLE20cc.

I have a 70" Revolver with the DLE20, about 10 lbs - very similar to your P47 - and use an APC 16x8 - excellent performance. But if you're going for speed it seems a 15x10 or 15x12 works better than a 16x8. And there's a good video on Youtube from a guy "knockoffs" with the same setup, but using a Xoar 15x8 - very nice performance. It's called "DLE20cc and Revolver 70".

Thought as much, just wanted to confirm with you. Are the nylon screws enough for rougher than normal landings ? Our field is not very even - rather rough and bumpy.

Thanx for your tip anyway...

Regards

Sandy jain

I've done the same on several different models.
Use 1/4-20 nylon screws, 3 works best.

Is there a limit on the size model thatitis safe to use nylon screws? Ilike this suggestion but would prefer to have as much Info as possible before running home to change all my landing gear screws.

I have personally had the ubdercarriage of a 60 size stick rip out because the model hit a hose on landing before safely coming to rest.

No hard rule about it, just use common sense.
I wouldn't use such on bigger 1/4 scale, or any 2-piece L-G.

If you are going the nylon screw route for the landing gear, then I advise that you forget about using any wheelpants at all, because if (when) the gear lets go, then the pants usually go right through the underside of the wings and with my luck and experience, the top also.

You get alot more airflow off an airplane engine vs a weedeater, chainsaw.
many full scale planes have movable lovers that either restrict airflow or open it up.
Look at the p-40

I have a 4 Star 120 with the CRRC 26 running a Xoar 17 x 8. If I remember correctly, it weighs about 12 lbs. I've tried a few different props, and keep coming back to the 17 x 8, at least for this plane/engine combo. Not unlimited vertical, but has nice speed and nice pull over the top.

Hope this helps.